A small group is using agents. Adoption has spread beyond one person but is not project-wide.
Assisted or autonomous
Assisted — a developer’s identity authored the commit and the agent added itself as co-author. The agent ran git commit during a working session, with a person there. Autonomous — a bot identity is the author, no human in the loop. Across the whole index, 93.7% of agent commits are assisted.
Agent share by month
Peak month: 64.3%. Bars are scaled to that peak, not to 100%.
Which agents
| GitHub Copilot | GitHub | 15 | 4% |
| Claude Code | Anthropic | 2 | 0.5% |
| Cursor Agent | Anysphere | 1 | 0.3% |
Verify it yourself
Sample commits that matched. Every one links to GitHub — check the trailers.
278df04dchore: pass nodedir to node-gyp via npm_package_config env in node integraGitHub Copilot834408e8fix(pack): honor min-release-age-exclude (#9760)GitHub Copilotef6cfeaafix(owner): use scoped registry for user lookup (#9786)GitHub Copilot080e3b29fix: block forbidden keys in Queryable setter to prevent prototype pollutiClaude Codec0fc5493fix(config): pause progress spinner during interactive editor spawn (#9372Claude Codebb135cc8fix(arborist): fix `peerOptional` dependency resolution in `buildIdealTreeCursor Agent
What was excluded
| Commits in window | 391 |
| Merge commits removed | −0 |
| CI / dependency bots removed | −14 |
| Considered | 377 |
Bots are excluded from the denominator entirely. Counting dependabot as “AI-written code” is the fastest way to produce a meaningless number.
How this was measured
Measured over February–August 2026, cloned directly. Detection is deterministic string matching against signatures agents write about themselves — no heuristics, no style analysis. Merge commits and CI bots are excluded from the denominator. The figure is a floor: squash merges strip trailers, so real usage is higher. Contributor counts are aggregate — no individual is named.
Run it yourself: npx qmmit-cli npm/cli